New Delhi, April 15 -- OpenAI has launched its GPT-5.4 Cyber model, which is a specialised version of its GPT-5.4 model built especially for defensive cybersecurity tasks. The new model announcement by OpenAI comes just weeks after rival Anthropic announced its Mythos AI model but did not release it to individual users owing to the risk of misuse.

In a blog post on Tuesday, OpenAI said that it is releasing GPT-5.4 Cyber 'in preparation for increasingly more capable models from OpenAI over the next few months'. The company said it is fine-tuning its models specifically to enable defensive cybersecurity use cases.

"we aim to make advanced defensive capabilities available to legitimate actors large and small, including those responsible fo...